Solved solution for sizing a "bladder" tank. Biggest issue I see is the lack of vision to look at the air side, yet the Bell and Gossett guide is clear.
Use at your discretion. Note that the 4 psi is good for up to 220F nominal per the guide. I've honestly never had to do above that.Expansion Tank.smz (355 КиБ) скачан 76 раз(а).

I can't help directly regarding the expansion tank [Mechanical Engineer stuff].
If you work in the 0.01 => critical, this Smath document is a piece of gold that
you will find nowhere else wrt water kg/m³/°C. WUKALOWITSCH [1958] or latest IAPWS
are "same Engineering wise".
Bell & Gossett guide: what's that ? good enough to reinvent the wheel of home
heating systems. For "Boilers", better go via the " Boiler Code".

This 3 pages Smath document crunches a lot ! in 109 sec.
XP Home, 1.8 GHz, Smath OFFicial release 5346.

Empirical Engineering is not tracable => OUT of my box

Jean

Thiele Domain [Water Masse Volumique].sm (41 КиБ) скачан 69 раз(а).

Jean,
Be nice! Please refrain from insulting other peoples work as it may be beneficial to others. Notice that I mentioned I used the Bell and Gossett article as a guide. This cuts through some items and makes the work empirical as well as traceable.

Stick to what works for you.

Wrote

Oh ! Alvaro: you are "grand savant" in that stuff. Can't help, just good at making maths work in Smath.
In the attached, is as far as I can go [primer Edu.]

Jean

Engineering is about applying knowledge, not "re-inventing the wheel".

"The following calculation utilizes Bell and Gossett Technical Manual TEH-1196B Air Management
Sizing and Installation Instruction as a guide".

Yes: what's that? no formulation, if you mean to refer to the image data sorry collab, the image
is too small to zoom and Smath does not have the clipboard operation.
I would have to capture and redo what you should have done in the first place: giving a readable image
You have no project scope to follow step by step and what's the problem.

"Highlighted items in YELLOW, below, belong on datasheet, schedule, etc".
What do you think collabs should do from there ? Scratch the head with the image ?

As it looks, you seem to have problem with the formulas pages: 6,7,8,9
In other words , your maths don't match TEH-1196B OK, but show the complete steps as it may result
from the unit system or else, maybe an Smath bug ???

My water tank is all in one. A home heating system [typical European] have an expansion thank,
On Bell & Gossett ? don't know ?
The question is AFAICU: is Bell & Gossett extrapolable to larger system than their products ?
My answer is: if Bell & Gossett is home approved up to certain size system , just purchase.
For more consequent systems: use other applicable codes.

Constructive criticism is accepted

Please note that this is a quick and dirty calculation and organization may not meet anyone's standards ... it has the meat to solve the problem.

Wrote

"Yes: what's that? no formulation

Formulation is in the guide, why re-create when I've documented where I got it from and it's been vetted for 50 plus years. This makes the sheet empirical. The image is a "pretty" graghic so young engineers can see a layout that is expected. No more. NEW engineers may have never seen or know what an expansion tank is ...

Wrote

You have no project scope to follow step by step and what's the problem.

Just solving for parameters required for a bladder ... pressurized expansion tank. Other calculations, like volume of system, are elsewhere. Technically, only 2 inputs are required as "green" items add margin. Altitude and volume of the system.

Wrote

"Highlighted items in YELLOW, below, belong on datasheet, schedule, etc".
What do you think collabs should do from there ? Scratch the head with the image ?

Again, this is the pertinent information that we gather from the calculation, like pump head. This should be required to be put into an equipment data sheet or specification for each unit. As an example, tank volume and acceptance volume are typically "assumed" to be the same. This is the error I see most of the time.

Wrote

As it looks, you seem to have problem with the formulas pages: 6,7,8,9
In other words , your maths don't match TEH-1196B OK, but show the complete steps as it may result
from the unit system or else, maybe an Smath bug ???

Formulation is in the guide, why re-create when I've documented where I got it from and it's been vetted for 50 plus years. This makes the sheet empirical. Units work out fine. Did calculations by hand to double check.

Wrote

My water tank is all in one. A home heating system [typical European] have an expansion thank,
On Bell & Gossett ? don't know ?
The question is AFAICU: is Bell & Gossett extrapolable to larger system than their products ?
My answer is: if Bell & Gossett is home approved up to certain size system , just purchase.
For more consequent systems: use other applicable codes.

That is the problem. Just purchase. The thing is, you must purchase the RIGHT size or the system fails (ask my two recent INDUSTRIAL clients). The calculations are valid for home, commercial, and industrial use. Math is math and physics is physics. Just depends on size of systems

Why do you insist on deriving equations, etc. when referencing a guide or book does that for you? This is published, and documented items from many years (like Crane TP410 Manual)? If you have time, feel free to expand and derive the items of concern. My 2 or 3 pg. calculation would turn into 8 with mostly "fluff" that is already documented and published in this guide. Can you explain what is technically wrong with the sheet???

ElSid, I suppose it's not "deriving" that you are supposed to do.
It would be fine if you just scanned the formulation from the book, so that implementation could be checked against the source.
Otherwise, how do you expect any capable and willing to help person have this source? You put an unnecessary and substantial load on those who want to give you helping help.

Wrote

It would be fine if you just scanned the formulation from the book, so that implementation could be checked against the source..

Noted. Constructive criticism with a suggested solution is highly appreciated.
Moving this weekend . I will try and update the file in the morning. Need sleep. Should I edit the first post?
The source is readily available for download and I was in a crunch ... so calling out the source was my documentation.